The study of the cities of iran inrelation to seismology and distance to fault

The purpose of the investigation of seismic studies is to provide a more accuratepicture of the characteristics ofquakingand the potential seismicity of the intended region for the reasonablespendof the administrative costs of civil and industrialprojects.The estimation of earthquake risk inseismicityregionhas great importanceforinfrastructure facilities, because the inappropriate and unprofessionalprojectscan results in the many life and financialdamages and losses.And also it causes to loss of manpower and wasteofbuilding materials.Thesafety factor should be determined by considering the useful life of the building and its importance inrelation to the environment andthenumber of people whoare in contact withitas well as the occurrence probability of earthquakein thelocation.This paper deals with the investigation of Iran s seismic situation and earthquake parametersmeasurement and as well as to review and study of the faults distancetoIran s major cities. In addition to the statistical analysison theearthquakes which their magnitudewasgreater than6/5 degree in terms of the Richter scale. Then, it was found that thedestroyed townsdistance to the earthquake epicenter was about 11 km